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US Patent: 889,432
Spark-plug
Patentee: George J. Blum (exact or similar names) - Chicago, IL USPTO Classifications: 123/154 Tool Categories: propulsion and energy : internal combustion engines : ignition systems : spark plugs Assignees: Armstrong-Blum Mfg. Co. - Chicago, IL Manufacturer: Not known to have been produced Witnesses: George L. Chindahl M. M. Daley	Patent Dates: Applied: Feb. 07, 1906 Granted: Jun. 02, 1908 Patent Pictures: USPTO (New site tip) Google Patents Report data errors or omissions to steward Jeff Joslin Vintage Machinery entry for Armstrong-Blum Mfg Co.
Description: This spark plug has integrated points.

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